Two Challenges for Renewable Biofuels (IMAGE) Chalmers University of Technology Caption Two challenges need to be overcome to realise affordable renewable jet fuels, according to the researchers. Credit Sasa Liu Usage Restrictions For media purpose only. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.